AP Chemistry Lab: Solution Mystery
Identification of Solutions Using Solubility Rules
Introduction
This problem tests your ability to design and carry out laboratory experiments and
to draw conclusions from your experimental work. You will be graded on your
experimental design, on your skills in data collection, and on the accuracy and
precision of your results. Clarity of thinking and communication are also
components of successful solutions to these problems, so make your written
responses as clear and concise as possible.
Safety Considerations
You are required to wear approved eye protection at all times during this lab.
Disposal of wastes need to be in the appropriate containers. Also, follow any safety
precautions given by your instructor when dealing with these solutions.
Lab Problem
You have been given 7 seven pipets that contain solutions of silver nitrate, barium
chloride, copper II nitrate, copper II sulfate, lead II nitrate, potassium iodide, and
sodium thiosulfate, though not necessarily in this order. Using ONLY the materials
provided (7-pipets to hold unknown solutions, cell plate, toothpicks, 150-mL – 250
mL beaker to hold pipets), devise and carry out an experiment to correctly
determine the contents of each pipet.
Lab Report
1. Give a brief description of your experimental plan (Introduction, Purpose, &
Objectives)
2. Record your data and other observations (Data & Observations)
3. Based on your observations, write the relevant equations (include ionic &
net ionic) that led to your conclusions (Data Analysis)
4. Conclusions – disclose what number you believe each solutions is and
justify(Conclusion & Reflection)